mmcirvin: (Default)
[personal profile] mmcirvin
As I said before, I do like the effect of Apple's subpixel font antialiasing on my LCD monitor. There's a glaring exception, though: it makes light text on dark backgrounds look too bold. I'm not sure exactly what's going on, but I think it's an actual character-rendering bug; I may complain about it to Apple if I can characterize it better.


A good example is on the Web Standards Project's new home page. Here's their mission-statement banner rendered with grayscale CRT antialiasing:

Light text on dark with grayscale antialiasing; looks like a good weight

Here it is with Medium LCD subpixel antialiasing:

Light text on dark with subpixel antialiasing; looks too bold and squashed together

If you're using a CRT, this will probably look even worse, but, trust me, it looks too bold even on an LCD. It doesn't seem to matter much whether you pick Light, Medium or Strong, in case you were wondering.

Here's a magnification of a small part of the above, with the two methods:

Light text on dark with grayscale antialiasing, magnified; the d and a have two almost black pixels between them

Light text on dark with subpixel antialiasing, magnified; the d and a are nearly touching

The d and a are almost kissing. Now, this is a little unfair, since blowing up a color antialiased image like this doesn't reproduce what is actually happening with the LCD color element grid. But it seems to me that there ought to be almost two whole pixels of blackness between those two letters, in which case, for instance, the line of reddish pixels at the right edge of the d should be either a fairly saturated red, or (if they don't want to risk visible color fringing) pretty dark. But it's not. It's almost as if there's a sign or off-by-one error going on somewhere.
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